The intent of this Quick Reference Guide is to provide a starting point for improving the security of your system, to serve as a pointer to more in-depth security information, and to increase security awareness and methods that can be used to improve security. (PDF format)

Probably the best Vim Cheat Sheet: “This is a single page describing the full vi/vim input model, the function of all keys, and all major features. You can see it as a compressed vi/vim manual. ” (GIF format)

Another good cheat sheet can be found here: http://linuxtutorial.todolistme.net/cheatsheet.php It’s good as you can hide sections you’re familiar with so you only see the valuable stuff. Also has links to a tutorial so if you need any more information on any section it’s right there for you.